diff --git a/drivers/ata/pata_it8213.c b/drivers/ata/pata_it8213.c
index f156da8..36d1f61 100644
--- a/drivers/ata/pata_it8213.c
+++ b/drivers/ata/pata_it8213.c
@@ -173,10 +173,10 @@
 
 		udma_enable |= (1 << devid);
 
-		/* Load the UDMA mode number */
+		/* Load the UDMA cycle time */
 		pci_read_config_word(dev, 0x4A, &udma_timing);
 		udma_timing &= ~(3 << (4 * devid));
-		udma_timing |= (udma & 3) << (4 * devid);
+		udma_timing |= u_speed << (4 * devid);
 		pci_write_config_word(dev, 0x4A, udma_timing);
 
 		/* Load the clock selection */